Headlight



Dec. 17, 1929.

J. PATTEN ET AL HEADLIGHT Filed Jan. 3, 1927 Patented Dec. 17, 1929 DSTTES P QFIC HEADLIGHT Application filed January 3, 1927.

This invention relates to vehicle head lights and has for its object toprovide an improved head light of the kind in which part of the lightproceeding from the light source or sources is intercepted by a screenor screens so arranged in relation to a reflector that the emergence oflight which would produce dazzle is prevented.

According to the invention a vehicle head light has a reflectorconsisting of upper and lower halves of a surface derived from a conicsection separated by a cylindrical element and has two separate lightsources disposed in the focal line of the cylindrical element.

Light sources are disposed at the foci of the upper and lower halves ofthe reflector, one or both of the light sources being provided with areflecting screen which prevents the emergence of upwardly directedrays. In

both these arrangements, the emergence of light which would producedazzle can be totally prevented by switching off one of the lightsources.

An embodiment of the invention, according 5 to which the headlight hasparabolic halves,

is shown, by way of example, in the accompanying drawing, in which Fig.1 is a Vertical section through the headlight, the lower source of lightcovered on the upper half.

Fig. 2 is a section similar to Fig. 1, both sources of light beingcovered on one half, the lower one on the upper half and the upper oneon the lower half.

a is the upper half of the conic section and b is the lower half, thetwo halves being connected the one with the other by a cylindrical partc, e is the upper and f the lower source of light. In Fig. 1 the lowersource of light f is covered with a totally reflecting mirrorfoil 9 onthe upper half and, as shown in Fig. 2, both sources of light e and fhave a mirror foil on one half, the lower one on the upper half andtheupper one on the lower half.

We claim In a headlight, a reflector comprising two spaced and opposedportions each of which conforms to a longitudinal half of a surface ofrotation, the surface thereof being formed by rotating a parabola abouits axis; an inter- Serial No. 158,688.

mediate connecting portion conforming to a surface of a paraboliccylinder; two sources of light positioned respectively at the foci ofsaid first-named portions, and two hemispherical light shields havinglight-reflecting concave surfaces, said shields being positioned

